/* 

by Richard Gorremans (RichardG@spiritwolfx.com) http://www.spiritwolfx.com 

*/

//begin date mask 
// Check browser version
var isNav4 = false, isNav5 = false, isIE4 = false
var strSeperator = "-"; 
// If you are using any Java validation on the back side you will want to use the / because 
// Java date validations do not recognize the dash as a valid date separator.
//var vDateType = 3; // Global value for type of date format
//                1 = mm/dd/yyyy
//                2 = yyyy/dd/mm  (Unable to do date check at this time)
//                3 = dd-mm-yyyy
				// 4 = mm/yyyy (not running datecheck on this)
var vYearType = 4; //Set to 2 or 4 for number of digits in the year for Netscape
var vYearLength = 2; // Set to 4 if you want to force the user to enter 4 digits for the year before validating.
var err = 0; // Set the error code to a default of zero
if(navigator.appName == "Netscape") {

if (navigator.appVersion < "5") {
isNav4 = true;
isNav5 = false;
}
else
if (navigator.appVersion > "4") {
        isNav4 = true;
isNav5 = true;
   }
}
else {
isIE4 = true;
}

function DateFormat(vDateName, vDateValue, e, dateCheck, dateType){

//alert(window.parent.event);
//alert(vDateName);
//alert(vDateValue);
//alert(e);
//alert(dateCheck);
//alert(dateType);
// vDateName = object name
// vDateValue = value in the field being checked
// e = event
// dateCheck 
// True  = Verify that the vDateValue is a valid date
// False = Format values being entered into vDateValue only
// vDateType
// 1 = mm/dd/yyyy
// 2 = yyyy/mm/dd
// 3 = dd/mm/yyyy
// 4 = dd-MMM-yyyy
//Enter a tilde sign for the first number and you can check the variable information.
//alert(vDateValue);
vDateType = dateType;
if (vDateValue == "~") {
alert("AppVersion = "+navigator.appVersion+" \nNav. 4 Version = "+isNav4+" \nNav. 5 Version = "+isNav5+" \nIE Version = "+isIE4+" \nYear Type = "+vYearType+" \nDate Type = "+vDateType+" \nSeparator = "+strSeperator);
vDateName.value = "";
vDateName.focus();
return true;
}
var whichCode = (window.Event) ? e.which : e.keyCode;

// Check to see if a seperator is already present.
// bypass the date if a seperator is present and the length greater than 8
if (vDateValue.length > 8 && isNav4) {
if ((vDateValue.indexOf("-") >= 1) || (vDateValue.indexOf("/") >= 1))
return true;
}
//Eliminate all the ASCII codes that are not valid
var alphaCheck = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/-";
isNav4 = false;
if (alphaCheck.indexOf(vDateValue) >= 1) {
    if (isNav4) {
        alert("Invalid Date\nPlease Re-Enter");
vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
}
else {
vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
return false;
   }
}
if (whichCode == 8) //Ignore the Netscape value for backspace. IE has no value
return false;
else {
//Create numeric string values for 0123456789/
//The codes provided include both keyboard and keypad values
    var strCheck = '47,48,49,50,51,52,53,54,55,56,57,58,59,95,96,97,98,99,100,101,102,103,104,105';
    //alert(whichCode);
if (true) {
    
if (isNav4)
{
    
    if (((vDateValue.length < 6 && dateCheck) || (vDateValue.length == 7 && dateCheck)) && (vDateValue.length >=1))
    {
        alert("Invalid Date\nPlease Re-Enter");
        vDateName.value = "";
        vDateName.focus();
        vDateName.select();
        return false;
    }

    if (vDateValue.length == 6 && dateCheck) 
    {

        var mDay = vDateName.value.substr(2,2);
        var mMonth = vDateName.value.substr(0,2);
        var mYear = vDateName.value.substr(4,4)
        //Turn a two digit year into a 4 digit year
        if (mYear.length == 2 && vYearType == 4)
        {
            var mToday = new Date();
            //If the year is greater than 30 years from now use 19, otherwise use 20
            var checkYear = mToday.getFullYear() + 30; 
            var mCheckYear = '20' + mYear;
            if (mCheckYear >= checkYear)
                mYear = '19' + mYear;
            else
                mYear = '20' + mYear;
        }
        var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
        if (!dateValid(vDateValueCheck))
        {
            alert("Invalid Date\nPlease Re-Enter");
            vDateName.value = "";
            vDateName.focus();
            vDateName.select();
            return false;
        }
        return true;
    }
    else
    {
        // Reformat the date for validation and set date type to a 1
    
        if (vDateValue.length >= 8  && dateCheck)
        {
            if (vDateType == 1) // mmddyyyy
            {
                var mDay = vDateName.value.substr(2,2);
                var mMonth = vDateName.value.substr(0,2);
                var mYear = vDateName.value.substr(4,4)
                vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
            }
            if (vDateType == 2) // yyyymmdd
            {
                var mYear = vDateName.value.substr(0,4)
                var mMonth = vDateName.value.substr(4,2);
                var mDay = vDateName.value.substr(6,2);
                vDateName.value = mYear+strSeperator+mMonth+strSeperator+mDay;
            }
            if (vDateType == 3) // ddmmyyyy
            {
                var mMonth = vDateName.value.substr(2,2);
                var mDay = vDateName.value.substr(0,2);
                var mYear = vDateName.value.substr(4,4)
                vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
            }
            //dal add
            if (vDateType == 4) // MMMyyyy
            {
                var mMonth = vDateName.value.substr(0,2);
                var mDay = vDateName.value.substr(8,0)
                var mYear = vDateName.value.substr(3,4)
                vDateName.value = mMonth+strSeperator+mYear+strSeperator+mDay;
            }
            // end dal
        
            //Create a temporary variable for storing the DateType and change
            //the DateType to a 1 for validation.
           
            var vDateTypeTemp = vDateType;
            vDateType = 1;
            var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
            if (!dateValid(vDateValueCheck)) 
            {
                alert("Invalid Date\nPlease Re-Enter");
                vDateType = vDateTypeTemp;
                vDateName.value = "";
                vDateName.focus();
                vDateName.select();
                return false;
            }
            vDateType = vDateTypeTemp;
            return true;
        }
        else 
        {
            if (((vDateValue.length < 10 && dateCheck) || (vDateValue.length == 10 && dateCheck)) && (vDateValue.length >=1))
            {
                alert("Invalid Date\nPlease Re-Enter");
                vDateName.value = "";
                vDateName.focus();
                vDateName.select();
                return false;
             }
        }
    }
}
else {
    //alert(1111111111111);
    //////////Adding Month Name Instead of Numeric /////////
    var strMonthArray = new Array(12);
    strMonthArray[0] = "Jan";
    strMonthArray[1] = "Feb";
    strMonthArray[2] = "Mar";
    strMonthArray[3] = "Apr";
    strMonthArray[4] = "May";
    strMonthArray[5] = "Jun";
    strMonthArray[6] = "Jul";
    strMonthArray[7] = "Aug";
    strMonthArray[8] = "Sep";
    strMonthArray[9] = "Oct";
    strMonthArray[10]= "Nov";
    strMonthArray[11]= "Dec";

    ////////////////////////////////////////////
// Non isNav Check

    if(vDateType == 4 && vDateValue.length > 0 && dateCheck)
        vDateValue = "01" + strSeperator + vDateValue;
//    alert(vDateValue.length);
//    alert(dateCheck);
    if (((vDateValue.length < 10 && dateCheck) || (vDateValue.length == 10 && dateCheck)) && (vDateValue.length >=1))
    {
        alert("Invalid Date\nPlease Re-Enter");
        vDateName.value = "";
        vDateName.focus();
        return true;
    }
    
    // Reformat date to format that can be validated. mm/dd/yyyy
    if (vDateValue.length >= 8 && dateCheck) 
    {
        
        // Additional date formats can be entered here and parsed out to
        // a valid date format that the validation routine will recognize.
        if (vDateType == 1) // mm/dd/yyyy
        {
            var mMonth = vDateName.value.substr(0,2);
            var mDay = vDateName.value.substr(3,2);
            var mYear = vDateName.value.substr(6,4)
        }
        if (vDateType == 2) // yyyy/mm/dd
        {
            var mYear = vDateName.value.substr(0,4)
            var mMonth = vDateName.value.substr(5,2);
            var mDay = vDateName.value.substr(8,2);
        }
        if (vDateType == 3) // dd/mm/yyyy
        {
            var mDay = vDateName.value.substr(0,2);
            var mMonth = vDateName.value.substr(3,3);
            var mYear = vDateName.value.substr(7,4)
           
        }
        if (vDateType == 4) // mm/yyyy dal add
        {
            var mMonth = vDateName.value.substr(0,3);
            var mYear = vDateName.value.substr(4,4);
            var mDay = '01';
           
            var datenow = new Date(); 
            if (mYear > datenow.getFullYear())
            {
                alert("Selected year greater than current year. Reenter..");
                vDateName.value = "";
                vDateName.focus();
                return true;
            }
        }
        if (mYear < 1930)
        {
                alert("Selected year should be between 1930 and Current year. Reenter..");
                vDateName.value = "";
                vDateName.focus();
                return true;
        }

        if (vYearLength == 4)
        {
            if (mYear.length < 4) 
            {
                alert("Invalid Date\nPlease Re-Enter");
                vDateName.value = "";
                vDateName.focus();
                return true;
            }
        }
        // Create temp. variable for storing the current vDateType
        var vDateTypeTemp = vDateType;
        // Change vDateType to a 1 for standard date format for validation
        // Type will be changed back when validation is completed.
        vDateType = 1;
        // Store reformatted date to new variable for validation.
        var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
        if (mYear.length == 2 && vYearType == 4 && dateCheck) 
        {
            //Turn a two digit year into a 4 digit year
            var mToday = new Date();
            //If the year is greater than 30 years from now use 19, otherwise use 20
            var checkYear = mToday.getFullYear() + 30; 
            var mCheckYear = '20' + mYear;
            if (mCheckYear >= checkYear)
                mYear = '19' + mYear;
            else
                mYear = '20' + mYear;
            vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
            // Store the new value back to the field.  This function will
            // not work with date type of 2 since the year is entered first.
            if (vDateTypeTemp == 1) // mm/dd/yyyy
                vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
            if (vDateTypeTemp == 3) // dd/mm/yyyy
                vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
            if (vDateTypeTemp == 4) // mm/yyyy
                vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;    
        } 
        if (!dateValid(vDateValueCheck))
        {
            alert("Invalid Date\nPlease Re-Enter");
            vDateType = vDateTypeTemp;
            vDateName.value = "";
            vDateName.focus();
            return true;
        }
        vDateType = vDateTypeTemp;
        return true;
    }
    else 
    {
        if (vDateType == 1)
        {
            if (vDateValue.length == 2) 
            {
                vDateName.value = vDateValue+strSeperator;
            }
            if (vDateValue.length == 5) 
            {
                vDateName.value = vDateValue+strSeperator;
            }
        }
        if (vDateType == 2) 
        {
            if (vDateValue.length == 4) 
            {
                vDateName.value = vDateValue+strSeperator;
            }
            if (vDateValue.length == 7) 
            {
                vDateName.value = vDateValue+strSeperator;
            }
        } 
        if (vDateType == 3) 
        {

            if (vDateValue.length == 2) 
            {
                vDateName.value = vDateValue+strSeperator;
            }
            if (vDateValue.length == 5) 
            {
                var mDay = vDateName.value.substr(0,2);
                var mMon = vDateName.value.substr(3,2);
                var mName = strMonthArray[Number(mMon-1)];
                vDateName.value = mDay+strSeperator+mName+strSeperator;
            }
        }
        if (vDateType == 4) 
        {
            if (vDateValue.length == 2) 
            {
                var mMon = vDateName.value.substr(0,2);
                if(mMon > 12 || mMon < 1)
                 {  
                    vDateName.value = "";
                    vDateName.focus();
                 }
                else
                 {   
                    var mName = strMonthArray[Number(mMon-1)];
                    vDateName.value = mName+strSeperator;
                 }  
            }
        }
        return true;
    }
}
if (vDateValue.length == 10&& dateCheck) {
if (!dateValid(vDateName)) {
// Un-comment the next line of code for debugging the dateValid() function error messages
//alert(err);  
alert("Invalid Date\nPlease Re-Enter");
vDateName.focus();
vDateName.select();
   }
}
return false;
}
else {
// If the value is not in the string return the string minus the last
// key entered.

if (isNav4) {
vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
}
else
{
//alert(vDateName.value.substr(0, (vDateValue.length-1)));
vDateName.value = vDateName.value.substr(0, (vDateValue.length));
return false;
         }
      }
   }
}

function dateValid(objName) 
{
    var strDate;
    var strDateArray;
    var strDay;
    var strMonth;
    var strYear;
    var intday;
    var intMonth;
    var intYear;
    var booFound = false;
    var datefield = objName;
    var strSeparatorArray = new Array("-"," ","/",".");
    var intElementNr;
    // var err = 0;
    var strMonthArray = new Array(12);
    strMonthArray[0] = "Jan";
    strMonthArray[1] = "Feb";
    strMonthArray[2] = "Mar";
    strMonthArray[3] = "Apr";
    strMonthArray[4] = "May";
    strMonthArray[5] = "Jun";
    strMonthArray[6] = "Jul";
    strMonthArray[7] = "Aug";
    strMonthArray[8] = "Sep";
    strMonthArray[9] = "Oct";
    strMonthArray[10] = "Nov";
    strMonthArray[11] = "Dec";
    
    //strDate = datefield.value;
    strDate = objName;
    if (strDate.length < 1) 
    {
        return true;
    }   
    for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) 
    {
        if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) 
        {
            strDateArray = strDate.split(strSeparatorArray[intElementNr]);
            if (strDateArray.length != 3) 
            {
                err = 1;
                return false;
            }
            else 
            {
                strDay = strDateArray[0];
                strMonth = strDateArray[1];
                strYear = strDateArray[2];
            }
            booFound = true;
        }
    }
    if (booFound == false) 
    {
        if (strDate.length>5) 
        {
            strDay = strDate.substr(0, 2);
            strMonth = strDate.substr(2, 2);
            strYear = strDate.substr(4);
        }
    }

    //Adjustment for short years entered
    if (strYear.length == 2) 
    {
        strYear = '20' + strYear;
    }
    strTemp = strDay;
    strDay = strMonth;
    strMonth = strTemp;
    intday = parseInt(strDay, 10);
    if (isNaN(intday)) 
    {
        err = 2;
        return false;
    }
    intMonth = parseInt(strMonth, 10);
    if (isNaN(intMonth)) 
    {
        for (i = 0;i<12;i++) 
        {
            if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) 
            {
                intMonth = i+1;
                strMonth = strMonthArray[i];
                i = 12;
            }
        }
        if (isNaN(intMonth)) 
        {
            err = 3;
            return false;
        }
    }
    intYear = parseInt(strYear, 10);
    if (isNaN(intYear)) 
    {
        err = 4;
        return false;
    }
    if (intMonth>12 || intMonth<1) 
    {
        err = 5;
        return false;
    }
    if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) 
    {
        err = 6;
        return false;
    }
    if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) 
    {
        err = 7;
        return false;
    }
    if (intMonth == 2) 
    {
        if (intday < 1) 
        {
            err = 8;
            return false;
        }
        if (LeapYear(intYear) == true) 
        {
            if (intday > 29) 
            {
                err = 9;
                return false;
            }
        }
    else 
    {
        if (intday > 28) 
        {
            err = 10;
            return false;
        }
    }
}
return true;
}

function LeapYear(intYear) {
if (intYear % 100 == 0) {
if (intYear % 400 == 0) { return true; }
}
else {
if ((intYear % 4) == 0) { return true; }
}
return false;
}
//  End Date Mask

